app.service("uploadService",function($http){
	this.upload = function() {
		var formData=new FormData();
		formData.append("file",file.files[0]);
		return $http({
			method:'post',
			url:'../upload.do',
			data:formData,
			headers:{"Content-Type":undefined},
			transformRequest:angular.identity
		});
	}
});